[kolla] Ussuri -source images now use stable branches tarballs

Hello,

Since [1] was merged - Kolla source type images are using stable branch tarballs for OpenStack projects - compared to latest point releases - as previously. There are some projects though, that kolla-build uses point releases for those, the list can be found in version-check tool source [2].

Users that want to build source images using latest point releases - can run tools/version-check.py with --versioned-releases option (-v) - and it will adapt sources list accordingly.

[1]: https://review.opendev.org/#/c/750297/ [2]: https://opendev.org/openstack/kolla/src/branch/master/tools/version-check.py...